Methods and systems for forming a composite yarn
AssigneePatrick Yarn Mills
InventorsMax Bivens, Gilbert Patrick
Life of this patent
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Abstract
A method and system for forming composite yarns having selected performance characteristics including cut resistance and/or fire/heat resistance. The composite yarn will include a core of one or more filaments and a fiber bundle wrapped about the core and integrated with one or more additional filaments that help bind the fibers about the core. An additional filament or other composite yarn can be plied together therewith to form the finished composite yarn. The core filament(s) will be selected from cut and/or fire/heat resistant materials, while the fibers of the fiber bundle and the additional filament(s) wrapped about the core can be selected from natural or synthetic fibers or filaments having additional desired properties.
Claims15
A composite yarn, comprising:
- a base yarn, comprising a core filament and a fibrous bundle, the fibrous bundle comprising a series of sheath fibers and at least a first filament, wherein the fibrous bundle is spun or twisted about the core filament, wherein the first filament is introduced during spinning of the series of sheath fibers about the core filament such that the first filament and the sheath fibers form an integrated filament and fibrous bundle that is twisted about the core filament sufficient to substantially lock and bind the core filament within the integrated filament and fibrous bundle, and wherein, the first filament being twisted with the sheath fibers about the core filament at approximately the same turns per inch as the sheath fibers to produce the base yarn with a first twist direction;
- and
- at least one additional filament or additional yarn plied and twisted with the base yarn, wherein the at least one additional filament or additional yarn is twisted in a second twist direction opposite the first twist direction sufficient to substantially minimize torque in the composite yarn;
- wherein the core filament comprises steel, stainless steel, aluminum, tungsten, and alloys thereof, glass, high density polyethylene, high density polypropylenes, high-strength polyarylate, silica, para-aramids, polypropylene, or liquid crystal polyesters.
A composite yarn, comprising:
- a first component comprising at least one first core filament formed of a material having a hardness of at least approximately 7.0 on the Mohs hardness scale, a first sheath of fibers spun about the at least one first core filament, and a first filament introduced during spinning of the first sheath of fibers about the core so as to be twisted about the core sufficient to substantially lock the core within the first sheath of fibers;
- and
- a second component comprising a core and a second sheath of fibers applied about the core;
- and
- wherein the first component is ring spun with the second component to form the composite yarn having the first yarn component as the core of the composite yarn with the second yarn component twisted thereabout.
Dependencies are inferred from the claim text.